学进去-教育应平等而普惠
试题
类型:听音,选择听到的内容
难度系数:0.65
所属科目:小学英语
听录音,选出你所听到的单词。(听两遍)
(     ) 1. A. mum             B. some                 C. name
(     ) 2. A. cool             B. good               C. doll
(     ) 3. A. window            B. wonderful            C. mango
(     ) 4. A. pencil                 B. pineapple            C. panda
(     ) 5. A. great            B. cake                 C. make
(     ) 6. A. these             B. there          C. three
(     ) 7. A. your               B. our               C. brother
(     ) 8. A. elephant            B. orange            C. pear
(     ) 9. A. an               B. any               C. two
(     ) 10. A. good             B. dog             C. salad
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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